The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 2003
Filed:
Jul. 12, 2000
Takumi Takeno, Kawasaki, JP;
Kenichi Nabeya, Kawasaki, JP;
Junya Matsushima, Kawasaki, JP;
Daisuke Ban, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A processor is adapted to support a complex instruction set without making major modifications to the existing hardware but by adding just a few controls and thereby emulating instructions in hardware. The processor is implemented by adding, to the existing processor, a second instruction decoder for decoding an expanded instruction code not capable of issuing an instruction per cycle, and for issuing one instruction per cycle by translating the expanded instruction code into a sequence of basic instructions; a counter for counting the number of instructions to be issued by the second instruction decoder, and for outputting a signal indicating that the expanded instruction code is being executed; and an instruction selection unit for selecting the instruction issued from the first instruction decoder when executing a basic instruction code and the instruction issued from the second instruction decoder when executing the expanded instruction code.